Thomas David Chadwick

Endurant Energy LLC provides energy infrastructure solutions including micro grids and distributed energy resources. It serves education and institutional, commerce and industrial, utilities, healthcare and hospitality, real estate development, and operations and maintenance sectors. The company was founded by Thomas David Chadwick in 2005 and is headquartered in Chicago, IL.

Geothermal International Ltd. designs and installs ground source heating and cooling systems. It offers heat pumps, air source heat pumps, gas absorbsion heat pumps, combined heat and power heat pumps to the commercial, residential, public and infrastructure industries. The firm integrates solar photovoltaics and thermal technology with renewable energy installations. The company was founded by Brian Davidson and Christopher Davidson in 2001 and is headquartered in Coventry, the United Kingdom.